Climate averages 1991–2020
Tongzhou weather
in September.
A warm, moderately wet month: the 5th warmest and the 9th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Tongzhou: daytime highs average 26.4°C and nights cool to about 15.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 59 mm of rain on roughly 7 days, which makes September a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Beijing (23 km away). In September its highs average 26.3°C, about as warm as Tongzhou, with 56 mm of rain.
Among the 884 cities listed in China, Tongzhou ranks joint 438th of 884 for the warmest September highs and joint 162nd of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Tongzhou is 0.7°C warmer than that mean.
From September to October, average highs fall by 7.0°C to 19.4°C, and monthly rainfall falls from 59 mm to 34 mm.
The annual picture
September in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tongzhou climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.9°C-7.8°C | -7.8°C | 2.5 | 0.8 | 9.710 h |
| February | 6.0°C-5.3°C | -5.3°C | 4.5 | 1.2 | 10.711 h |
| March | 13.3°C-0.4°C | -0.4°C | 8.9 | 2.3 | 11.912 h |
| April | 21.5°C7.3°C | 7.3°C | 20 | 3.8 | 13.213 h |
| May | 28.2°C14.2°C | 14.2°C | 38 | 5.4 | 14.414 h |
| June | 31.8°C19.7°C | 19.7°C | 84 | 8.5 | 14.915 h |
| July | 31.9°C22.4°C | 22.4°C | 175 | 13.4 | 14.715 h |
| August | 30.2°C21.1°C | 21.1°C | 129 | 11.3 | 13.714 h |
| September, selected | 26.4°C15.5°C | 15.5°C | 59 | 7.3 | 12.512 h |
| October | 19.4°C7.9°C | 7.9°C | 34 | 4.5 | 11.211 h |
| November | 10.0°C-0.9°C | -0.9°C | 14 | 2.0 | 10.010 h |
| December | 3.0°C-6.1°C | -6.1°C | 3.2 | 0.9 | 9.49 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Beijing in SeptemberChina · 23 kmHigh 26.3°C · Low 15.2°C · 56 mm rain
- Shunyi in SeptemberChina · 24 kmHigh 26.0°C · Low 14.9°C · 59 mm rain
- Daxing in SeptemberChina · 34 kmHigh 26.4°C · Low 15.5°C · 55 mm rain
- Sanhe in SeptemberChina · 36 kmHigh 25.9°C · Low 15.3°C · 62 mm rain
- Langfang in SeptemberChina · 43 kmHigh 26.5°C · Low 16.3°C · 62 mm rain
- Mentougou in SeptemberChina · 49 kmHigh 25.6°C · Low 14.7°C · 80 mm rain
- Liangxiang in SeptemberChina · 49 kmHigh 26.0°C · Low 15.0°C · 55 mm rain
- Changping in SeptemberChina · 50 kmHigh 25.3°C · Low 14.6°C · 65 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tongzhou) is explained once on the Tongzhou year overview and on the Sources, method and limits page.
Shunyi lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.